http://aporaclepayables.blogspot.com/2016/04/error-this-tax-registration-number-is.html
Problem Description
ERROR:This tax registration number is already in use for party type: Third Party and party name: Pearl Continental Hotel for the same period.
When we try to open the Supplier in AP having the same 'Tax Registration number' the above error occurs.
SR Solution
Thanks for your time and confirmation that you are not using Ebtax.
1.The original issue you were having was an error : This tax registration number is already in use for party type. This is caused by an expecting functionality,
At this time on R12 it is NOT allowed to have the same tax registration number for different parties (supplier, customers,,,) hence you need to have and implement a workaround to allow this.
2. For the same reason, every time that you update a party, that error will be returned in case the same tax registration is used for any other party. Based on above, the workaround is suggested in order to be able to update the supplier and to be able to save the data,
3. So for the specific questions you asked:
3.1 What is the Root cause,
the root cause is the standard functionality which does not allow the same registration number for different parties:
Please check the following note and Enhancement request for the same:
Customers Workbench: Error 'Tax Registration Number is already in use for party type: Third Party, Party Name: XXX' when creating customer with same tax registration number as suppliers ( Doc ID 1320761.1 )
ER 11930002 : TAX REGISTRATION NUMBER ALREADY IN USE WHEN UPDATING SUPPLIER
3.2 Yes, There is a possibility that happens again for any other supplier. In that case, we should follow and apply again the suggested workaround. Solution is described on ( Doc ID 1135593.1 )
I will attach your company name to the existent ER,
